Can ISR Curt A20 Fifth Wheel Hitch Fit OEM Pucks of 2026 GMC Sierra

Updated 09/03/2026 | Published 09/01/2026

Question:

Hello, I run a dealership and we have a customer who just purchased a 2026 GMC Sierra HD with the factory 5th wheel prep group. We also have a Curt A20 that appears to be Model 16140 hitch but the legs dont go with the GM puck system. What is the easiest solution to this? Can we buy replacement legs for the hitch or is there an adapter that will work.

asked by: Ryan T

Expert Reply:

Hey Ryan, we have just what you are looking for with the part # CU53FR. This is a leg kit that is designed for the OEM pucks of the OEM rail kit in the bed of a 2026 GMC Sierra and also the head and center section of a Curt A20 so it's exactly what your customer needs to use the Curt A20. What are they planning on towing?

expert reply by: Jameson C